Product Detail Professional drum machine -12 velocity sensitive pads (w/Dynamic Articulation) enabling a drum sound to change its tonal content Backlit LCD, MIDI I/O, Stereo Main and Aux outputs, drum Roll function, headphone output, 1/4" instrument input jack, 2 footswitch jacks ,Battery powered (6xAA - not included) or AC adapter - included 32MB sound set with percussion bank and bass synth including over 500 Drum and percussion sounds and 50 bass sounds Built-in Effects- Reverb, EQ and Compression on each pad, preset or editable by the user . The "Alesis SR18 Drum Machine with Effects Engine" is best product for you. We recommended Alesis SR18 Drum Machine with Effects Engine